14166721 has 4 divisors (see below), whose sum is σ = 14623744. Its totient is φ = 13709700.

The previous prime is 14166709. The next prime is 14166727. The reversal of 14166721 is 12766141.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14166721 - 2¹⁷ = 14035649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14166721.

It is not an unprimeable number, because it can be changed into a prime (14166727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228465 + ... + 228526.

It is an arithmetic number, because the mean of its divisors is an integer number (3655936).

Almost surely, 2^14166721 is an apocalyptic number.

It is an amenable number.

14166721 is a deficient number, since it is larger than the sum of its proper divisors (457023).

14166721 is an equidigital number, since it uses as much as digits as its factorization.

14166721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457022.

The product of its digits is 2016, while the sum is 28.

The square root of 14166721 is about 3763.8704812998. The cubic root of 14166721 is about 241.9671710584.

The spelling of 14166721 in words is "fourteen million, one hundred sixty-six thousand, seven hundred twenty-one".